He completed tours of duty at the American Consulate General in Zagreb, Yugoslavia, the Embassy in Moscow, and the U.S. State Department's Office of Soviet Union and West German Affairs. He also served as Senior Watch Officer and then Deputy Director of the Department's Operations Center, its 24-hour crisis management facility.
From 1978-1981, Steiner served as Deputy Director of the Office of Theater Military Policy in the State Department's Bureau of Politico-Military Affairs. From 1981-1983, he served as the Public Affairs Advisor to the Bureau of European Affairs.
Steiner served from 1983 to 1988 as Director of Defense Programs on the National Security Council Staff. He was named by President Reagan as the U.S. Representative to the Special Verification Commission (SVC), the implementing body for the Intermediate-Range Nuclear Forces Treaty (INF), when the Treaty entered into force June 1988. Steiner was confirmed by the United States Senate on June 26, 1990.
Amb. Steiner received Presidential Meritorious Service Awards in 1990 and 1992, and he received the Arms Control and Disarmament Agency's Superior Honor Award in 1993. In May 1983, he received the Department of State's Superior Honor Award for his work on the INF and other European security issues. He was a recipient of group Superior Honor Awards in 1980 as part of the team of officials in the Politico-Military Bureau who participated in the development of U.S. and NATO policy on INF, and in 1973 while serving at the U.S. Embassy in Moscow.
Born in Pennsylvania in 1940, Steiner received a B.A. in Political Science from Yale University in 1963 and a Masters degree in International Affairs from Columbia University in 1966. He is married with three children and resides in Chevy Chase, Maryland with his family.